<template>
  <div class="login_container">
    <!-- 头像区域 -->
    <div class="login_box">
      <div class="avatar_box">
        <img src="../assets/logo.png" alt />
      </div>
      <!-- 登录表单区域 -->
      <el-form
        :model="loginForm"
        ref="loginFormRef"
        :rules="loginFormRules"
        label-width="0px"
        class="login_from"
      >
        <!-- 用户名 -->
        <el-form-item prop="username">
          <el-input v-model="loginForm.username" prefix-icon="iconfont icon-user"></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input v-model="loginForm.password" prefix-icon="iconfont icon-3702mima"></el-input>
        </el-form-item>
        <!-- 按钮 -->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
import { log } from "util";
import { async } from "q";
export default {
  data() {
    return {
      //登录表单 的数据绑定
      loginForm: {
        username: "admin",
        password: "123456"
      },
      //表单验证规则
      loginFormRules: {
        //用户名验证
        username: [
          { required: true, message: "请输入用户名", trigger: "blur" }
          // { min: 3, max: 5, message: '长度在 3 到 5 个字符', trigger: 'blur'}
        ],
        //密码验证
        password: [
          { required: true, message: "请输入密码", trigger: "blur" }
          //  { min: 3, max: 5, message: '长度在 3 到 5 个字符', trigger: 'blur'}
        ]
      }
    };
  },
  methods: {
    resetLoginForm() {
      //重置refs resetFields()
      // console.log(this)
      this.$refs.loginFormRef.resetFields();
    },
    login() {
      //验证密码是否正确
      // console.log(this);
      this.$refs.loginFormRef.validate(async valid => {
        //判断是否可以登录可以为true反之flase
        //  console.log(valid);
        if (!valid) return;
        const { data: res } = await this.$http.post("login", this.loginForm);
        // console.log(this);
        if (res.meta.status !== 200) return this.$message.error("登录失败");
        this.$message.success("登录成功");
        //1.将登陆之后的token，保存到客户端的sessionStorage中
        //token只在当前网站打开期间才生效 将token保存到客户端的sessionStorage中
        window.sessionStorage.setItem("token", res.data.token);
        //2.通过编程式导航跳转到后台主页，路由地址是/home
        this.$router.push("/home");
      });
    }
  }
};
</script>

<style lang="less" scoped>
.login_container {
  background-color: #2b4b6b;
  height: 100%;

  .login_box {
    width: 450px;
    height: 300px;
    background-color: #fff;
    border-radius: 3px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    .avatar_box {
      height: 130px;
      width: 130px;
      border: 1px solid #eee;
      border-radius: 50%;
      padding: 10px;
      box-shadow: 0 0 10px #ddd;
      position: absolute;
      left: 50%;
      transform: translate(-50%, -50%);
      background-color: #fff;
      img {
        height: 100%;
        width: 100%;
        border-radius: 50%;
        background-color: #eee;
      }
    }
  }
}
.login_from {
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 0 20px;
  box-sizing: border-box;
}
.btns {
  display: flex;
  justify-content: flex-end;
}
</style>